diff --git a/lib/database_cleaner/data_mapper/truncation.rb b/lib/database_cleaner/data_mapper/truncation.rb
index 9d66185..098ddb3 100644
--- a/lib/database_cleaner/data_mapper/truncation.rb
+++ b/lib/database_cleaner/data_mapper/truncation.rb
@@ -30,7 +30,7 @@ module DataMapper
           execute("SET FOREIGN_KEY_CHECKS = 0;")
           yield
         ensure
-          execute("SET FOREIGN_KEY_CHECKS = #{old.first};")
+          execute("SET FOREIGN_KEY_CHECKS = ?", *old)
         end
       end